Search on table

table_search.js

function tableSearch(searchId, tableId) {
    var phrase = document.getElementById(searchId);
    var table = document.getElementById(tableId);
    var regPhrase = new RegExp(phrase.value, 'i');
    for (var i = 1; i < table.rows.length; i++) {
        flag = regPhrase.test(table.rows[i].cells[0].innerHTML);
        if (flag) {
            table.rows[i].style.display = '';
        } else {
            table.rows[i].style.display = 'none';
        }
    }
    table.dispatchEvent(new Event('change', { 'bubbles': true }));
}

document.addEventListener('DOMContentLoaded', function () {
    document.getElementById('input_search').addEventListener('keyup', function() {
        tableSearch('input_search', 'table_search');
    });
});